Following advice from my first Endo appointment where I've been diagnosed with Hashimoto's, the consultant suggested as there's a genetic link, that any sisters should be tested too. My 3 sisters have been tested. 2 were only sent for TSH readings. They rang for results today. One has 3.5 and the other didn't get a reading but was told is fine. The 3rd sister has been tested for TSH, T4 and TPO. Her results are due next week. My question is, for the 2 that had TSH only and the 3.5 and ok readings, are they clear for TPO by those results, or do they need the T4 and TPO too, due to my diagnosis?